Terrible service

September 3rd 2021 , I ordered a chicken pita meal i.e pita, single side chips n buddy coke via the Nandos app, all together was R107 including delivery , the driver arrived & I tapped my card n he told me the transaction didn't go through and since I didn't receive any notification from my bank I agreed to swipe the card & punched on my pin the second round , ok my receipt came out & I left , immediately when I entered the house I received an sms showing that I was charged twice , & my buddy coke was also missing from my order. I then called in Nandos Ghandi Ghandi sa since my delivery was from there , a lady by the name of Thuli told me to reverse the money using my app, I mean how can I do that since it wasnt a debit order?? Today 4th Sep 2021 I decided to go in store , I spoke to the manager Alex Langa n he told me to go gt a bank statement, what an inconvenience, its month end , there's long ques in bank & some ATM's are even offline , I explained but he told me about a procedure, what procedure because he admitted that he saw the records from that speed point & it's TRUE I was charged twice but now why do I have to go to so much trouble if that's the case , why am I the one to be inconvenienced yet its Nando's speedpoints that aren't functioning properly, can I get my cash back plz